Terrain modelling with B-spline type surfaces defined on curved knot lines

摘要

B-spline type surfaces on curved knot lines are useful for interpolation of scattered data while preserving desirable terrain breaks or discontinuities which are not necessarily parallel to a given straight line. This paper considers data scattered along parallel scan profiles. It is shown how the large composite linear system which arises for curved knot lines in two directions may be decomposed into smaller linear systems with subsequent savings in storage and processing time.